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199 is a prime number from 101-200. 199 has 2 factors, 1 and 199. It is the 46th prime number, and the twenty-first and last prime number from 101-200.
If you put the digits of 199 in any order, you still get a prime number (919, 991). In fact, you can even turn it upside down and still get a prime number (661).